TM-9-2320-272-23-4

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 4 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-4 - Page 875 of 1393

INSTALLATION

1.

Using utility chain (Figure 2, Item 13) and lifting device (Figure 2, Item 14), raise boom (Figure 2, Item 1) and

remove shipper braces (TM 9-2320-272-10).

2.

Install elevating cylinder (Figure 2, Item 12) on turntable (Figure 2, Item 9) with lower retaining pin

(Figure

2,

Item 8) and cotter pin (Figure 2, Item 7).

3.

Install elevating cylinder (Figure 2, Item 12) on boom (Figure 2, Item 1) with upper retaining pin

(Figure

2,

Item

2), lockwasher (Figure 2, Item 3), and screw (Figure 2, Item 4). Tighten screw 44 to 61 lb-ft

(60 to 83 N·m).

4.

Connect cylinder oil supply line (Figure 2, Item 6) to snubber valve (Figure 2, Item 10).

5.

Connect oil return (Figure 2, Item 5) line to cylinder adapter fitting (Figure 2, Item 11).

6.

Remove lifting device and chain from boom (Figure 2, Item 1).

TM 9-2320-272-23-4

0693

0693-4